Lamp setting device



June 1931. Q WERNER 1,810,036

LAMP SETTING DEVICE Filed Oct. 30, 1928 INVENTOR 0502/- Mmv/t BY 22 a 7 ATT'oRNEY Patented June 16, 1931 UNITED STATES PATENT OFFICE OSCAR WERNER OF SOUTH BEND, INDIANA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA SETTING DEVICE Application filed October 30, 1928. Serial No. 316,054.

My invention relates to illuminating de vices and has particular relation to a device adapted to aid in properly locating or focusing the lamp filament in a projector.

An object of my invention is to rovide a device which I term a lamp setter y means of which the proper position of a lamp and lamp filament in a projector housing may be determined without burning the lamp.

Another object of my invention is to provide a device of the above description w llCh may be quickly and readily adjusted on the projector.

Another object of my invention is to provide means for illuminating the filament of a lamp during the focusing process.

A still further object of my invention is to provide an inexpensive, durable, efiicient and accurate device of the above description.

In racticing my invention, I provide essentia ly a structure of T-shape adapted to engage a projector housing. Two (peep holes are provided in the T structure an arranged in such a manner that, when the lamp tilament has been properly adjusted in a lateral and in a vertical direction, it may be seen through the first of the peep holes and is registered in the center thereof. A mirror is provided in line with the second peep hole, set at an angle of so that, when the lamp filament is at the proper position with reference to the reflector, 1n an in-and-out direction, the filament may be seen through the second peep hole and registers with a scribed line in the reflector. The lamp filament is illuminated by means of a flash light and a mirror mounted on the lamp-setting device in front of the flash light-so that the filament is illuminated by the reflected light rays.

My invention may best be understood by reference to the accompanying drawings, in which Figure 1 is a view, in perspective, of my lamp-setter device engaged with the housing of a projector.

Fig. 2 is a top elevational view of the lampsetter device and a lamp and lamp filament.

Fig. 3 is a front elevational view of the lam p-setter, and

Fig. 4 is a side elevational view of the lamp setter.

Referring to the drawings, my device is preferably utilized in projectors of the type having a circular housing 1, such as is shown .in Fig. 1. A lamp 2, having a filament 3, is

mounted inside the housing, and may be adjusted laterally, vertically and in-and-ont with reference to a reflector 4. The reflector 4 is alined within the housing 1 so that it is coaxial therewith and is at a predetermined osition relatively to the front edge of the ousing 1.

My device comprises a member 11, of substantially T shape,-having lugs 12, 13 and 14 at the ends of the arms, which are adapted to engage the rim of the projector housing, as shown in Figs. 2, 3 and 4. On engaging the projector housing, the lamp setter 1s automatically lined up in correct position with reference to the focal point of the reflector by reason of the proportions of the arms of the lamp setter.

An upwardly extending portion 15 of the frame provides a support for a forwardly extending boss or tubular member 16 of substantially cone shape. A peep hole 17 is novided longitudinally of the cone-shape boss and a plate 18, having a rectangular opening 19, is secured to the rear face of the upwardly extending portion 15 in such manner that, when the lamp filament is in the proper lateral and vertical position with regard to the reflector 4, it registers in the center of the rectangular opening when viewed through the peep hole.

A rearwardly extending portion 21 constitutes a. art of the lamp setter and provides a means or mounting a small chromium or nickel plated reflector 22 thereon. The reflector is set at an angle of 45 with respect to the rearwardly extending member.

A-second forwardly extending boss 23 is provided on the right hand arm of the frame, and a drilled opening 24 extends longitudinally of the boss constituting a second peep hole such that the line of sight lines up with a scribed line on the reflecting mirror 22. The reflecting mirror is so positioned that when the lamp filament is at the proper distance from the reflector, termed the focal distance, it registers with the scribed line on the reflector, when viewed through the second peep hole.

Since the interior of the housing may be dark when filament setting is desired, it is desirable that the lamp filament be illuminated from some outside source so that it will be more apparent when viewed through the peep holes. This is accomplished by means of a flash light 31 mounted on the rear face of the T-shape member. A reflecting mirror 32 which may be chromium or nickel plated, is provided, and is set at such an angle that the reflected light from the flash light strikes the lamp filament and illuminates it.

In adjusting the position of the lamp filament with regard to the reflector of a housing, the door of the projector is opened and the lamp setter is placed against the rim of the housing 1 as shown in Fig. 1, with the lugs inside of the flange thereof. The lamp is then viewed through the upper peep hole, and the lamp moved laterally and vertically until the filament is in the center of the rectangular opening 19. The lamp filament, by this operation, is properly positioned, as regards lateral and vertical positions. The filament is then viewed through the lower pecphole 23 and moved in and out by means of the focusing mechanism until the filament lines up with the scribed line on the reflector 22 as hereinbefore explained. It may be readily understood, by reference to Fig. 2, that the filament is then in the proper predetermined position of correct focusing.

My device maybe constructed of aluminum and it is, therefore, light and easily transported. It is quickly and easily applied to any one of a number of similar lamp housings and provides means for quickly adj usting the lamp filaments to the correct position. The device is simple and durable and may be used by an operator Without changing his position. The position assumed is the same as that used in servicing the projector. This is a marked advantage, since the operator may service and focus the unit without moving from his position as, for instance, if he were standing on a ladder.

Although I have described a specific modification of my device, other modifications may be made by those skilled in the art without departing from the spirit and scope of my invention, as set forth in the appended claims.

I claim as my invention:

1. A lamp-setting device to aid in focusing the lamps of flood-lights and the like comprising a frame disposed to engage the projcctor housing and provided with peep holes in said frame for observing the location of the filament laterally, vertically and iii-andout with relation to said housing and a source of light associated with the frame to illuminate the lamp filament.

2. In combination with a projector comprising a housing, a reflector inside the housing, a lamp and a focusing mechanism for focusing the lamp, means for indicating when the lamp filament is in the proper position comprising a frame for engaging the housing, said frame being disposed to provide a peep hole for locating the lamp filament laterally and vertically and a second peep hole for locating the filament in in-and-out relation with respect to the reflector, and a source of light associated with the frame for illuminating the lamp filament.

In testimony whereof, I have hereunto subscribed my name this thirteenth day of September 1928.

OSCAR WERNER.

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